[PATCH synaptics] conf: increase top software button area to 15%

[Eric Anholt]

Peter Hutterer <peter.hutterer at who-t.net> writes:

> We had reports that the top software button area is hard to hit for those
> using the trackpoint and clicking the buttons with their thumb.
>
> Analysis of event recordings (3 different people) for left, right and middle
> clicks shows that there is a significant amount of events up to about 10mm
> (with outliers up to 12mm) from the top of the touchpad. That maps to 15%.
>
> Interestingly, the middle button is not affected by this, presumably the
> haptic feedback of the little dots sticking out from the surface make hitting
> the button easier.

I'm confused by this bit of the commit message -- aren't you also
increasing the soft middle button rectangle size?

It makes me really happy to see changes being driven by tracing of user
behavior, though.  I wouldn't have even looked at a synaptics change if
not for the compelling commit message :)
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